The Substance Shown Below Is the Fe-Protoporphorin IX Found in Heme

question 73

Multiple Choice

The substance shown below is the Fe-protoporphorin IX found in heme which is involved in oxygen transport in the blood. Which of the following correctly describes this substance?

• A) There are four coordinate covalent bonds in the structure.
• B) Fe(I
• I) has six d electrons.
• C) Fe obeys the 18-electron rule.
• D) All of the above are correct for this substance.

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Definitions:

Firm Commitment Underwriting

A type of underwriting where the underwriter buys the entire offering from the issuer and sells it to investors, assuming full financial risk.

Underwriting Spread

The difference between the amount underwriters pay to acquire securities from the issuer and the price at which they sell these securities to investors.

Shares

Portions of ownership in a corporation or financial asset available to investors.

Market Value

Market value is the current price at which an asset or service can be bought or sold in a marketplace, reflecting the value that market participants assign to it.